Abstract: A micromachined angle measuring gyroscope using a dual mass architecture measures angular positions rather than angular rates. The invention decouples the effects of drive and sense through the use of a dual mass architecture, and is comprised of a single lumped drive mass, which is structurally coupled to a second lumped slave mass, where the drive mass is electrostatically driven at the first resonant frequency the system using parallel plate electrodes. The slave mass is driven to higher amplitudes than the drive mass. In the presence of rotation, the line of oscillation in both masses precesses, which is easily detectable in the slave mass due to the amplified motion, and is exactly equal to the angle of rotation. The two illustrated embodiments are z-axis realizations of this principle, where the first device uses an inner drive/outer sense architecture and the second uses an outer drive/inner sense architecture.

Abstract: A computer-based system provides arm movement therapy for patients with sensory motor impairments. The system is based off a web site that provides access to assessment and therapy exercises designed to test and improve motor coordination in the arm. It operates over the World Wide Web using client-side applets, and can track user movement recovery over time and report it to a remote server computer. The system can also be customized to provide a personalized program of therapeutic exercise to a multiplicity of individuals. A mass manufactured computer input device senses the user's movement and provides a means to track sensory motor performance.